/*
* JSON Response:
* [
* {"target": "status.200", "datapoints": [[1720.0, 1370846820], ...], },
* {"target": "status.204", "datapoints": [[null, 1370846820], ..., ]}
* ]s
*/
func (h *RenderHandler) jsonResponse(w http.ResponseWriter, data interface{}) {
if m, ok := data.([]*metrics.Metrics); ok {
w.WriteHeader(http.StatusOK)
fmt.Fprintf(w, "%s([", h.jsonp)
for i, mi := range m {
if i > 0 {
fmt.Fprintf(w, ",")
}
fmt.Fprintf(w, `{"target":"%s","datapoints":[`, mi.Target)
for ii := 0; ii < len(mi.Datapoints); ii++ {
if ii > 0 {
fmt.Fprintf(w, ",")
}
val := "null"
if mi.Datapoints[ii][0] != nil {
val = fmt.Sprintf("%.2f", *mi.Datapoints[ii][0])
}
fmt.Fprintf(w, "[%s, %.0f]", val, *mi.Datapoints[ii][1])
}
fmt.Fprintf(w, "]}")
}
fmt.Fprintf(w, "])")
glog.Infof("%v\n", data)
} else {
glog.Errorf("%v\n", data)
http.Error(w, fmt.Sprintf("%v", data), http.StatusBadRequest)
}
}
func main() {
if config.Pprof.Cpu != "" {
// Start Profiler
f, err := os.Create(config.Pprof.Cpu)
if err != nil {
glog.Fatal(err)
}
defer f.Close()
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
http.HandleFunc("/render", render.Handler)
glog.Infoln("ListenAndServe", config.Cfg.Webserver.Addr)
go func() {
glog.Fatal(http.ListenAndServe(config.Cfg.Webserver.Addr, nil))
}()
// Handle SIGINT and SIGTERM.
sig := make(chan os.Signal)
signal.Notify(sig, os.Interrupt, os.Kill)
glog.Errorf("Syscall: %v - Exit\n", <-sig)
if config.Pprof.Mem != "" {
// Start Mem Profiler
f, err := os.Create(config.Pprof.Mem)
if err != nil {
glog.Fatal(err)
}
pprof.WriteHeapProfile(f)
f.Close()
}
}
func main() {
if config.Pprof.Cpu != "" {
// Start Cpu Profiler
f, err := os.Create(config.Pprof.Cpu)
if err != nil {
glog.Fatal(err)
}
defer f.Close()
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
ln, err := net.Listen("tcp", config.Cfg.Listener.Addr)
if err != nil {
glog.Fatalln(err)
}
glog.Infoln("ListenAndServe", config.Cfg.Listener.Addr)
go func() {
for {
conn, err := ln.Accept()
if err != nil {
glog.Errorln(err)
continue
}
go handle(conn)
}
}()
// Handle SIGINT and SIGTERM.
sig := make(chan os.Signal)
signal.Notify(sig, os.Interrupt, os.Kill)
glog.Errorf("Syscall: %v - Exit\n", <-sig)
if config.Pprof.Mem != "" {
// Start Mem Profiler
f, err := os.Create(config.Pprof.Mem)
if err != nil {
glog.Fatal(err)
}
pprof.WriteHeapProfile(f)
f.Close()
}
}